<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<script>
    const c = 15;
    const d = 2;

    let result = c + d;

    console.log("Значение переменной result: " + result);
</script>
</body>
</html>